Deep-read → library-save end-to-end (click a result → read → save) is a
client-driven multi-step flow; the search/explore/library surfaces are all
verified reachable and rendering.
Existing real-dev-infra Playwright coverage now proves the end-to-end
Search/Explore → deep-read → Library handoff for the seeded BFF matrix:
query/filter state, result-open telemetry, Nisaba/Veritas/Tara/Nyx/Metis
destination handoffs, saved-items BFF writes, cache-free second-device Library
hydrate, and resume back to the canonical destination surfaces.
The journey source now marks the old cross-device Library endpoint and
seeded-destination handoff gaps as resolved while leaving offline resume,
home-rail reflection, and unseeded object-template permutations open.